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(No Model.)

W. D. GRAY. SUPPORT FOR SHAKING SCREENS No. 454,132. Patented June16,1891.

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77 27377149665. fave 267507":

UNITED STATES PATENT OFFICE.

lVILLIAM D. GRAY, OF MILWAUKEE, WISCONSIN, ASSIGNOR TO THE EDWVARD P.ALLIS COMPANY, OF SAME PLACE.

SUPPORT FOR SHAKING-SCREENS.

SPECIFICATION forming part of Letters Patent No. 454,132, dated June 16,1891. Application filed March 26, 1890. Renewed November 29, 1890.Serial No. 373,067. (No model.)

To all whom it may'concer'n:

Be it known that I, WILLIAM D. GRAY, of Milwaukee, in the county ofMilwaukee and State of Wisconsin, have invented certain Improvements inSupports for Shaking-Screens, of which the following is a specification.

This invention relates to machines in which horizontal screens aresuspended by pendent links so mounted that they may swing freely in alldirections to permit a circulatory movement of the screen.

The invention has reference to an improved device for sustaining andadjusting the upper ends of the links in order that they may be broughtinto the position best adapted to secure a satisfactory action of thescreen.

My improvements may be applied to machines which are in all otherrespects of ordinary construction, as it pertains exclusively to themanner of sustaining the links. I have omitted from the drawings thedriving mechanism and other parts usually employed.

In the accompanying drawings, Figure 1 is atransverse vertical sectionthrough a portion of the frame-work and one side of the screen with mydevice applied thereto. Fig. 2 is a longitudinal vertical sectionillustrating the same parts.

Referring to the drawings, A represents a portion of the main frame,andB one side of the usual horizontal screen-frame.

C is a vertical bolt passing through the top of the main frame andprovided above and below the same with thumb-nuts c and c, which admitof its being raised and lowered at will.

D represents a casting having at the top a horizontal slotted bar d toreceive the lower headed end of the vertical screw by which the castingis sustained. The slot in the bar (Z admits of the casting beingadjusted horizontally in the direction of the length of the machine,while a nut d applied to the screw above the bar D, serves to hold thecasting firmly in the required position. The casting is formed at itslower part with a horizontal slotted bar (1 extending transversely ofthe machine, the slot in this lower portion extending at right angles tothat in its upper portion. To the under side of the bar (1 is secured aneye-plate d by means of a vertical bolt d passing through the slot, sothat the eye-plate may be shifted at will along the bar (1 transverselyof the machine, in order to vary the lateral inclination of the link.

E represents one of the screen-sustaining links hooked at its upper endthrough the eye-plate (Z and at its lower end through a plate on theside of the screen.

By means of the parts above described the operator is enabled to adjustthe upper end of the link lengthwise or crosswise of the machine, andalso to raise or lower it at will.

Having thus described my invention, what I claim is- In combination withthe main frame, the vertically-adjustable bolt, the casting sustained bysaid bolt and provided with the two horizontal slots at right angles toeach other, the eye-plate adjuslably secured to the casting, and thescreen-sustaining link connected to the eye-plate.

In testimony whereof I hereunto set my hand, this 10th day of March,1890, in the presence of two attesting witnesses.

\VILLIAM D. GRAY.

Witnesses:

WM. BANNEN, EDW. F. BYRON.

